This is an unusual, vintage item. It's a Hexadecimal arithmetic converter, made from heavy cardboard, with pivoted wheels and windows to show the settings and results. It was made in 1985 by Smith Pro

 

The QV05-25 from Mullard is another example of the design known as the 807.A strong pair of 807 beam power tubes with brown base, made in England at Mullard's Blackburn plant. Can be used as an RF amp

 

2 United Electronics 805 Tubes,pair USA manufacture--selling as used-tested good at 800V Always willing to combine shipments Certain countries will ship EMS only-contact me-countries include Russia,Si

 

JIMJAMS VINTAGE MUSIC Brings you 2 vintage Genalex KT66 audio output tubes. Tubes are as pictured, there is alittle residue around the base of the tubes. Tubes are described below. Tubes were tested o

 

4 Mullard 12AU7A Tubes,quad UK manufacture-selling as used-TV7 tested-test nil for shorts TV7 tested : 56/56 is minimum Test : 112/108,106/100,102/100 and 94/94 Always willing to combine shipments

 

Good Day to you and thanks for stopping by. Please read description carefully. Up for auction today we have a vintage HH Scott LK48 Integrated Stereo Amplifier. Amp is in good working order and is unt

 

42 total Amperex Holland halo getter “Made in Holland” 6DJ8/ECC88, some are large halo getter and some small halo getter, all have white lettering, both triode sections test ~82-85+ very good/stro

 

In perfect working condition. Looks almost brand new. Shipping in original box. Product Details:Head Configuration2 Head Design4 Track / 2 ChannelTapeAutomatic Tape Type SelectionChrome Tape Capabıli

 

800x600 This auction is for two (2) 12AX7 ECC83 vacuum tubes manufactured by Amperex. These are used old stock tubes. They have been tested. The results are shown below. These tubes are guaranteed and

 

Here are good used RCA Radiotron UX-281 tubes .These tubes have the black plates and the same construction inside. . I tested the tubes on my I-177B Mutual Conductance Tube tester and they both read a